| Official Name: | Kasegan-e Sofla |
| Native Name: | كاسگان سفلي |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Isfahan |
| Subdivision Type2: | County |
| Subdivision Name2: | Semirom |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Vardasht |
| Population As Of: | 2006 |
| Population Total: | 203 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 31.6528°N 51.4586°W |
Kasegan-e Sofla (Persian: كاسگان سفلي, also Romanized as Kāsegān-e Soflá; also known as Kāsegān-e Pā’īn) is a village in Vardasht Rural District, in the Central District of Semirom County, Isfahan Province, Iran. At the 2006 census, its population was 203, in 38 families.